GB1209586A - Improvements to telealarm networks - Google Patents
Improvements to telealarm networksInfo
- Publication number
- GB1209586A GB1209586A GB9275/69A GB927569A GB1209586A GB 1209586 A GB1209586 A GB 1209586A GB 9275/69 A GB9275/69 A GB 9275/69A GB 927569 A GB927569 A GB 927569A GB 1209586 A GB1209586 A GB 1209586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- comparator
- feb
- holding current
- telealarm
- networks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/008—Alarm setting and unsetting, i.e. arming or disarming of the security system
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/14—Central alarm receiver or annunciator arrangements
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Alarm Systems (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Radio Relay Systems (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
1,209,586. Alarm systems. GROUPEMENT ATOMIQUE ALSACIENNE ATLANTIQUE. 20 Feb., 1969 [20 Feb.. 1968], No. 9275/69. Addition to 1,120,455. Heading G4H. The normal holding current of the alarm system claimed in the parent Specification is reduced by a bridge circuit having one of its arms connected to a satellite station 1-3, 5, 6, a comparator 11 providing an amplified unbalance signal to the central station when the holding current changes from its normal value in response to operation of switch 1. Comparator 11 may be an operational difference amplifier, one input of which is earthed through an overload protection and filter circuit 14. Separate threshold detectors may be connected to line 22 to detect different line conditions.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR996434A FR1423948A (en) | 1964-11-26 | 1964-11-26 | Improvements to remote alarm networks |
FR140595A FR94224E (en) | 1964-11-26 | 1968-02-20 | Improvements to remote alarm networks. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1209586A true GB1209586A (en) | 1970-10-21 |
Family
ID=39149270
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB50144/65A Expired GB1120455A (en) | 1964-11-26 | 1965-11-25 | Remote-controlled alarm networks |
GB9275/69A Expired GB1209586A (en) | 1964-11-26 | 1969-02-20 | Improvements to telealarm networks |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB50144/65A Expired GB1120455A (en) | 1964-11-26 | 1965-11-25 | Remote-controlled alarm networks |
Country Status (7)
Country | Link |
---|---|
US (2) | US3435145A (en) |
BE (1) | BE727850A (en) |
DE (1) | DE1908255A1 (en) |
FR (2) | FR1423948A (en) |
GB (2) | GB1120455A (en) |
LU (1) | LU49928A1 (en) |
NL (2) | NL6515429A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3740487A (en) * | 1971-04-05 | 1973-06-19 | Scovill Manufacturing Co | Intercommunication and remote unit selection system employing a minimum of interconnecting wire |
JPS5016393U (en) * | 1973-06-08 | 1975-02-21 | ||
US4017836A (en) * | 1976-04-05 | 1977-04-12 | The United States Of America As Represented By The Secretary Of The Navy | Event stacker and display device |
DE2846343A1 (en) * | 1978-10-25 | 1980-05-08 | Sachs Systemtechnik Gmbh | ELECTRONIC WARNING SYSTEM |
DE3268015D1 (en) * | 1982-07-10 | 1986-01-30 | Fuss Fritz Kg | Circuit arrangement for signalling alarms |
US4866019A (en) * | 1987-01-13 | 1989-09-12 | Akzo N.V. | Catalyst composition and absorbent which contain an anionic clay |
US5155480A (en) * | 1990-12-27 | 1992-10-13 | Adc Telecommunications, Inc. | Event reporting using a two-wire non-blocking bus structure |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2919307A (en) * | 1958-09-24 | 1959-12-29 | Bell Telephone Labor Inc | Order wire alarm and control circuit |
-
1964
- 1964-11-26 FR FR996434A patent/FR1423948A/en not_active Expired
-
1965
- 1965-11-24 US US509571A patent/US3435145A/en not_active Expired - Lifetime
- 1965-11-25 GB GB50144/65A patent/GB1120455A/en not_active Expired
- 1965-11-25 LU LU49928A patent/LU49928A1/xx unknown
- 1965-11-26 NL NL6515429A patent/NL6515429A/xx unknown
-
1968
- 1968-02-20 FR FR140595A patent/FR94224E/en not_active Expired
-
1969
- 1969-02-03 BE BE727850D patent/BE727850A/xx unknown
- 1969-02-18 US US800054A patent/US3566400A/en not_active Expired - Lifetime
- 1969-02-19 DE DE19691908255 patent/DE1908255A1/en active Pending
- 1969-02-19 NL NL6902615A patent/NL6902615A/xx unknown
- 1969-02-20 GB GB9275/69A patent/GB1209586A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR94224E (en) | 1969-07-18 |
BE727850A (en) | 1969-07-16 |
FR1423948A (en) | 1966-01-07 |
NL6515429A (en) | 1966-05-27 |
US3435145A (en) | 1969-03-25 |
US3566400A (en) | 1971-02-23 |
NL6902615A (en) | 1969-08-22 |
DE1908255A1 (en) | 1970-07-23 |
LU49928A1 (en) | 1966-01-25 |
GB1120455A (en) | 1968-07-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PLNP | Patent lapsed through nonpayment of renewal fees |